I think the naive approach is to think that things are black and white, absolutely good or absolutely bad, and so on by mere association. Scientifically useful results from scientists that are awful humans are still useful results on their own. A donation to a University (assuming no strings attached) doesn't make the University wrong by association, despite a donator who's an awful entity. Governments collect taxes from good and bad people and no one blinks an eye thinking the governments should lift their nose and walk away from money coming from criminals.